Blue concrete?

[MrAgnér]

Hello! Uninformed here. Is this blåbetong?

 

[larsbj]

It doesn't look like it.

 

[SågspånPappspikEternit]

Yes, it seems to be.

That said, there's absolutely no reason to worry!

 

[SågspånPappspikEternit]

It doesn't look like it, looks like regular plaster?

How differently one can see, I think it looks like joined blocks of blåbetong with yellow-painted plaster on it .

 

[larsbj]

Post some more pictures, preferably sharper

 

[MrAgnér]

Here are some pictures for you

 

[SågspånPappspikEternit]

I still vote for the option "yes, it is blåbetong".

 

[larsbj]

I still vote for the option "yes, it is blue concrete".

Haha, well I don't think it's blue enough, it looks like regular aerated concrete.

Maybe it's best if TS taps on it to get a fresh fracture surface.

I also agree that it's not a problem.

 

[BirgitS]

Best maybe if TS taps so that there is a fresh fracture surface.

And if TS can tell us if it really looks blue. We don't know how accurate the camera's color filter is.

 

[larsbj]

And if the original poster can tell us if it really looks blue. We don't know how accurate the camera's color filter is.

That might be the case, mobile photos are often misleading.
Here is the color I have in mind.

 

[Hedberge]

As previously mentioned, it's difficult to determine colors from pictures. In what context do you need to know if it's blåbetong or not? Is it for demolition and disposal, radon issues, or just curiosity?

 

[MrAgnér]

Can try to get a piece loose tomorrow and take a photo. We have bought a house and saw this today at the back of the pantry. So the reason for the question is our living environment. This is our first house, and I'm worried that it might be dangerous. I know very little about it, but I assume that a long-term radon measurement must be done before knowing if it's even worth doing something about it. If it is blåbetong. Thanks for the responses so far!

 

[Hedberge]

I had a radon test and a gamma measurement done in my demolition property. It cost 700 SEK and took about 10 minutes. They didn't find any blue concrete, it might take longer if there is blue concrete. But if you need to determine if there is blue concrete and in which part of the house, it was very affordable and a non-destructive test.

I’ll try to get a piece tomorrow and take a photo.
We have bought a house, and saw this today at the very back of the pantry. So the reason for the question is our living environment. This is our first house, and I’m worried that it might be dangerous. I know very little about it, but I assume that you have to do a long-term radon measurement before you can even know if it's worth doing anything about. If it is blue concrete. Thanks for the responses so far!

 

[jbernspang]

Hello,
Blåbetong as a product is safe to handle, unlike eternit and other asbestos-based products which should be handled with caution if they crack and break. That is, there is no need for remediation.

Blåbetong is made from materials containing radon, and this gas decays over time to form radon daughters. Exposure to these increases the risk of lung cancer. Therefore, it's good to keep track of your ventilation if you have a house built with blåbetong in the living environment (as I do). The level can then be measured using long-term measurements, sometimes offered for free by the municipality, and if the level is high, you should review your ventilation. We stay below the limit with natural ventilation, but I have added some vents when renovating the house.

There are also scientifically proven links that radon increases the risk of lung cancer in combination with smoking, and that it is more effective to quit smoking.

Balanced information on the subject: https://www.stralsakerhetsmyndigheten.se/omraden/radon/vad-ar-radon/halsorisker-med-radon/

Good luck with the house!
Johan